JP2012078411A - Optical closure - Google Patents

Abstract

An optical closure capable of ensuring workability while reducing the size is provided.
An optical closure (1) includes a housing (3) for housing an optical trunk cable (2), optical trunk cable fixtures (6) that are attached to both ends of the housing (3) and fasten the optical trunk cable (2), and the housing (3). A storage tray 9 that stores the extra length of the optical fiber 12 that is disposed on the upper side and is taken out from the inside of the optical trunk cable 2, and a drop cable that is disposed on the lower side of the housing 3 and holds a plurality of drop cables 20. A holder 10 and an adapter holder 11 that is disposed on the front side of the housing 3 and holds an optical adapter 23 for connecting the optical fiber 12 and the drop cable 20 are provided. The storage tray 9 and the drop cable holder 10 are rotatably attached to the back surface of the housing 3. The adapter holder 11 is rotatably attached to the front surface portion of the storage tray 9.
[Selection] Figure 1

Description

  The present invention relates to an aerial optical closure for drawing an optical cable into a FTTH user's home, for example.

  As a conventional optical closure, for example, the one described in Patent Document 1 is known. The optical closure described in Patent Document 1 includes a cable gripping fitting and a drop cable gripping part attached to both ends of a connecting rod, and a connection part storage tray attached between both ends of the connecting bar, Four adapters for connecting the optical fiber taken out from the trunk optical cable and the optical fiber of the drop cable are connected to the tray side by side in the width direction.

JP 2009-8960 A

  However, in the above prior art, the width dimension of the optical closure has to be increased. For this reason, when the optical closure is installed in the aerial space, the optical closure may damage the scenery from the FTTH user's house.

  The objective of this invention is providing the optical closure which can ensure workability | operativity, aiming at size reduction.

  The optical closure according to the present invention is disposed on the upper side of the casing, the casing that accommodates the optical trunk cable containing a plurality of optical fibers, the optical trunk cable fixing portion that fixes the optical trunk cable to the casing, and the optical trunk line. A storage tray that stores the extra length of the optical fiber taken out from the inside of the cable, a retractable cable holder that is disposed on the lower side of the housing and holds the retractable cable connected to the optical fiber, and on the front side of the housing And an adapter holder for holding an adapter for connecting the optical fiber and the lead-in cable. The adapter holder is rotatably attached to the storage tray.

  As described above, in the optical closure of the present invention, the storage tray is arranged on the upper side of the casing, the retractable cable holder is arranged on the lower side of the casing, and the adapter holder is arranged on the front side of the casing. The width dimension and height dimension of the closure need not be increased more than necessary, and the optical closure can be miniaturized.

  Further, by arranging the storage tray on the upper side of the housing, it becomes easy to store the extra length of the optical fiber taken out from the inside of the optical trunk cable in the storage tray. By disposing the pull-in cable holder on the lower side of the casing, it becomes easy to pull out the pull-in cable toward the user's house. By arranging the adapter holder on the front side of the housing, it becomes easy to insert and remove the connector with respect to the adapter. Furthermore, by attaching the adapter holder to the storage tray so as to be rotatable, the adapter holder is rotated toward the upper side of the casing so that the entire interior of the casing is exposed when viewed from the front side of the casing. Therefore, it becomes easy to access the optical fiber of the optical trunk cable housed in the housing. As described above, workability for the optical closure can be ensured.

  Preferably, the storage tray is rotatably attached to the back surface portion of the housing. In this case, since the work space from the front side of the housing to the inside of the housing is widened by rotating the storage tray toward the upper side of the housing, the optical fiber of the optical trunk cable housed in the housing Access to is even easier. Thereby, workability | operativity with respect to an optical closure is fully securable.

  Preferably, the lead-in cable holder is rotatably attached to the back surface portion of the housing. In this case, by rotating the lead-in cable holder toward the lower side of the housing, the work space from the front side of the housing to the inside of the housing becomes wide. Therefore, the optical trunk cable housed in the housing is Access to the optical fiber is further facilitated. Moreover, it becomes easy to route the lead-in cable in the lead-in cable holder. Thus, sufficient workability for the optical closure can be ensured.

  ADVANTAGE OF THE INVENTION According to this invention, the workability | operativity with respect to an optical closure can be ensured, aiming at size reduction of an optical closure. Since the optical closure can be miniaturized in this way, it is possible to suppress the optical closure installed in the aerial from damaging the scenery from the user's house.

It is a perspective view which shows the external appearance of one Embodiment of the optical closure concerning this invention. It is a perspective view which shows an external appearance when the optical closure shown in FIG. 1 is seen from the opposite side. It is a front view of the optical closure shown in FIG. It is a top view of the optical closure shown in FIG. It is a bottom view of the optical closure shown in FIG. It is a perspective view which shows the external appearance of the state which the cover part of the storage tray shown in FIG. 1 opened. It is a side view which shows each state of the optical closure shown in FIG. It is a perspective view which shows the external appearance of the state which the storage tray shown in FIG. 1 rotated upwards with respect to the housing | casing. It is a perspective view which shows an external appearance when the optical closure shown in FIG. 8 is seen from the opposite side. It is a perspective view which shows the external appearance of the state which the adapter holder shown in FIG. 1 rotated upwards with respect to the storage tray, and the drop cable holder rotated downward with respect to the housing | casing. It is a perspective view which shows an external appearance when the optical closure shown in FIG. 10 is seen from the opposite side.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of an optical closure according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view showing an external appearance of an embodiment of an optical closure according to the present invention, and FIG. 2 is a perspective view showing an external appearance of the optical closure shown in FIG. 1 when viewed from the opposite side. 3 is a front view of the optical closure shown in FIG. 1, FIG. 4 is a plan view of the optical closure shown in FIG. 1, and FIG. 5 is a bottom view of the optical closure shown in FIG. . In each figure, the optical closure 1 of this embodiment is an aerial drop closure for drawing a drop cable into the FTTH user's home.

  The optical closure 1 includes a housing 3 having a substantially U-shaped cross section that accommodates an optical trunk cable 2. Two protrusions 4 and two protrusions 5 are provided on the back surface of the housing 3 (part opposite to the open side).

  Optical trunk line cable fixtures 6 for fixing the optical trunk line cable 2 are respectively attached to both ends of the housing 3. The optical trunk cable fixture 6 has a base part (not shown) attached to the upper end of the lower screw part 7 and a cable pressing part (not shown) attached to the lower end of the upper screw part 8. In the state where the optical trunk cable 2 is placed on the base portion, the upper screw portion 8 is screwed downward, and the optical trunk cable 2 is pressed against the base portion 7 by the cable pressing portion, so that the optical trunk cable 2 is enclosed. Secure to body 3.

  The optical closure 1 is disposed on the storage tray 9 disposed on the upper side of the housing 3, the drop cable holder 10 disposed on the lower side of the housing 3, and the front side (open side) of the housing 3. Two adapter holders 11.

  As shown in FIG. 6, the storage tray 9 includes a box-shaped tray main body 13 that stores the extra length of the optical fiber 12 taken out from the inside of the optical trunk cable 2, and the tray main body 13 via a hinge portion 14. The lid 15 is provided so as to be openable and closable and covers the inside of the tray main body 13. The storage tray 9 is made of, for example, a translucent material. The tray body 13 is provided with a plurality of tongue pieces 16 for suppressing the extra length of the optical fiber 12. At the tip of the lid portion 15, three hook portions 17 that are hooked on the bottom surface of the tray main body 13 are provided.

  On the bottom surface of the tray main body 13, two protrusions 18 connected to the protrusions 4 of the housing 3 via a rotation shaft are provided. Accordingly, the storage tray 9 is rotatably attached to the back surface of the housing 3 as shown in FIGS. In addition, two pairs of protruding portions 19 are provided on the front surface of the tray body 13 on both the left and right sides.

  The drop cable holder 10 is a member having a substantially U-shaped cross section that holds a plurality of (here, four) drop cables 20 so as to be routed. The drop cable holder 10 is provided with a plurality of tongue pieces 21 for holding the drop cable 20.

  Two protrusions 22 extending upward are provided on the back surface of the drop cable holder 10. These protrusions 22 are connected to the protrusions 5 of the housing 3 via a rotation shaft. Therefore, the drop cable holder 10 is rotatably attached to the back surface portion of the housing 3 as shown in FIGS. 7, 10, and 11.

  The adapter holder 11 is a member that holds a double optical adapter 23 having four connector insertion portions 23a (see FIG. 7). The optical adapter 23 is a connector component that connects the optical connector plug 24 assembled with the optical fiber 12 taken out from the inside of the optical trunk cable 2 and the optical connector plug 25 assembled with the drop cable 20.

  A pair of projecting portions 26 connected to the projecting portions 19 of the tray main body 13 via a rotation shaft are provided on the upper portion of the adapter holder 11. Therefore, the adapter holder 11 is rotatably attached to the front surface portion of the storage tray 9 as shown in FIGS. 7, 10, and 11.

  In the optical closure 1 as described above, the outer sheath of the optical trunk cable 2 is removed and a plurality of optical fibers 12 are exposed. The extra lengths of these optical fibers 12 are stored in the storage tray 9. And the optical connector plug 24 assembled | attached to the edge part of the optical fiber 12 is inserted in the connector insertion part 23a of the one side of the optical adapter 23. FIG.

  On the other hand, a plurality (four in this case) of drop cables 20 are introduced from one side of the optical closure 1 and held in a state of being drawn around the drop cable holder 10. And the optical connector plug 25 assembled | attached to the edge part of the drop cable 20 is inserted in the connector insertion part 23a of the other side of the optical adapter 23. FIG. As a result, the optical fiber 12 and the drop cable 20 are connected via the optical adapter 23.

  At this time, the optical connector plug 24 assembled to the optical fiber 12 taken out from the optical trunk cable 2 is inserted into the connector insertion portion 23 a corresponding to the inside of the optical closure 1 in the optical adapter 23 and assembled to the drop cable 20. The optical connector plug 25 thus inserted is inserted into the connector insertion portion 23 a corresponding to the outside of the optical closure 1 in the optical adapter 23. Thereby, it becomes easy to route the optical fiber 12 and the drop cable 20 in the optical closure 1.

  Such an optical closure 1 is installed in an aerial state in a state of being covered with a protective cover case (not shown).

  As described above, in the present embodiment, the storage tray 9 is disposed on the upper side of the housing 3, the drop cable holder 10 is disposed on the lower side of the housing 3, and the adapter holder 11 is disposed on the front side of the housing 3. Place. That is, since the storage tray 9, the drop cable holder 10, and the adapter holder 11 are arranged in a space-efficient manner around the housing 3, the optical closure 1 can be reduced in size. Thereby, when the optical closure 1 is installed in the aerial space, it can suppress that the optical closure 1 impairs the scenery from a user's house.

  At this time, by disposing the storage tray 9 on the upper side of the housing 3, it becomes easy to store the extra length of the optical fiber 12 taken out from the optical trunk cable 2 in the storage tray 9. Also, by placing the drop cable holder 10 on the lower side of the casing 3, the pull-out position of the drop cable 20 is on the lower side of the optical trunk cable 2, so that the drop cable 20 is pulled out toward the user's house. It becomes easy. Further, by arranging the adapter holder 11 on the front side of the housing 3, it becomes easy to perform the operation of inserting / removing the optical connector plugs 24, 25 into / from the optical adapter 23.

  In addition, when the adapter holder 11 is pivotally attached to the front portion of the storage tray 9 and the storage tray 9 and the drop cable holder 10 are pivotally attached to the rear portion of the housing 3, when additional construction is performed. Will also be easier to work with.

  Specifically, as shown in FIG. 10, by rotating the adapter holder 11 upward with respect to the storage tray 9, the entire interior of the housing 3 appears when viewed from the front side of the housing 3. The optical fiber 12 present in the housing 3 is easy to handle. Further, for example, when there is no obstacle or the like directly above the housing 3, as shown in FIG. 8, by rotating the storage tray 9 upward with respect to the housing 3, As a result, the entire inside of the housing 3 is revealed, and the work space for the inside of the housing 3 is widened, so that the optical fiber 12 can be easily handled. Further, by rotating the drop cable holder 10 downward with respect to the housing 3, the work space in the housing 3 is widened, so that the optical fiber 12 can be easily handled and the drop cable holder 10 is dropped. The work of routing the cable 20 is facilitated.

  Further, by attaching the adapter holder 11 to the front portion of the storage tray 9 so as to be rotatable, the tension of the optical fiber 12 pulled out from the storage tray 9 and connected to the optical adapter 23 when the adapter holder 11 is rotated is minimized. Can be suppressed.

  The present invention is not limited to the above embodiment. For example, in the above-described embodiment, the storage tray 9 and the drop cable holder 10 are configured to be pivotally attached to the back surface portion of the housing 3, but are not limited to such a configuration. Only one of the drop cable holders 10 may be rotatable with respect to the housing 3, or both may not be rotatable with respect to the housing 3.

  Moreover, in the said embodiment, although the optical fiber 12 taken out from the trunk line optical cable 2 and the drop cable 20 are connected, it is not restricted especially to a drop cable as a lead-in cable drawn in to a user's house.

DESCRIPTION OF SYMBOLS 1 ... Optical closure, 2 ... Optical trunk cable, 3 ... Housing, 6 ... Optical trunk cable fixing tool (optical trunk cable fixing part), 9 ... Storage tray, 10 ... Drop cable holder (retraction cable holder), 11 ... Adapter Holder, 12 ... optical fiber, 20 ... drop cable (retraction cable), 23 ... optical adapter.

Claims (3)

A housing that accommodates an optical trunk cable incorporating a plurality of optical fibers;
An optical trunk cable fixing portion for fixing the optical trunk cable to the housing;
A storage tray that is disposed on the upper side of the housing and stores an extra length of the optical fiber taken out from the optical trunk cable;
A retractable cable holder that is disposed on the lower side of the housing and holds a retractable cable connected to the optical fiber,
An adapter holder that is disposed on the front side of the housing and holds an adapter for connecting the optical fiber and the lead-in cable;
The optical closure is characterized in that the adapter holder is rotatably attached to the storage tray.   The optical closure according to claim 1, wherein the storage tray is rotatably attached to a back surface portion of the housing. The optical closure according to claim 1 or 2, wherein the lead-in cable holder is rotatably attached to a back surface portion of the casing.

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